tr:first-child {
  background-color: yellow;
}

tr:nth-of-type(2n-1):not(:first-child) {
  background-color: gray;
}

tr:nth-of-type(2n):not(:first-child) {
  background-color: white;
}

/* tr:first-child {
  background-color: yellow;
} */


/* tr:nth-of-type(1) {
  background-color: transparent;
} */